Bye Bye squirrels...
https://www.hashaltcoin.com/en/batches/1Way cheaper and easier than this op. Bitmain wins again and won't charge 4%.
A dropdown menu rather than waiting for a bitstream.
Check out - ''The Technicals'' on Youtube.
F1 is made of earlier generation of small FPGAs. Look at the power usage for example. And it is "closed source". You are dependent on the vendor to release new algos or to delete existing algos, you cannot run 3rd party bitstreams on F1. But yes, it is an alternative, which has its pros and cons.